"The distinguishing character of the Mercersburg Theology, in one word, is its Christological interest, its way of looking at all things through the Person of the crucified and risen Saviour. […] In thus agreeing with the Creed, the system of course holds itself to be to the same extent in full agreement with the proper sense of the Scriptures; where in truth all stress is laid on the Person of Christ, on his resurrection from the dead, on his glorification at the right hand of God, on the sending of the Holy Ghost, and on his presence and working through all time in the Church which is his body, the fullness of Him that filleth all in all."
-John Williamson Nevin
“Letter to Dr. Henry Harbaugh”, in Catholic and Reformed: Selected Theological Writings of John Williamson Nevin, ed. Charles Yrigoyen and George H. Bricker (Pittsburgh: The Pickwick Press, 1978) pp. 405-411.